It's one of Wales' toughest challenges and athletes from all over the world are gathering as Ironman Wales returns for another year. The seaside town of Tenby was transformed from tourist hotspot to athlete base.

It is one of the toughest challenges in the sporting calendar and is made up of: a 2.4-mile swim in Carmarthen Bay;a 112-mile bike ride around Pembrokeshire;a 26.2-mile marathon in Tenby town centre.

Our very own Jo Garzoni aced this course in 13 hours and 47 mins!! We are all so very proud of her for such an amazing achievement!

We are a small, but friendly running club and we welcome everyone to our website. ​Please get in touch if you would like more information about our club.

“Try not to think of training as hard work. Don’t focus on how challenging the distance will be; enjoy yourself. Yes, get in as many miles as you can, keep climbing that ladder, but try not to worry if you come up short one day. Don’t lose sight of the fun.”

When you become a member of or renew your membership with Thunder Runners you will automatically be registered as a member of England Athletics. We will provide England Athletics with your personal data which they will use to enable access to an online portal for you (called myAthletics).

​England Athletics will contact you to invite you to sign into and update your MyAthletics portal (which, amongst other things, allows you to set and amend your privacy settings). If you have any questions about the continuing privacy of your personal data when it is shared with England Athletics, please contact dataprotection@englandathletics.org.